My Buff Orpington duck, Penny, has been sitting on a clutch of about 12 eggs since March 2. However, during the first week, she got off the nest a few times, sometimes for a few hours at a time. She has now been sitting diligently, only getting up to grab a quick bite and wet her feathers. do you think the eggs are still viable? Will her leaving the nest for a few hours kill the ducklings?